631 



MALACOLOGY. 



MALACOLOGY. 



631 



Order 8. Cyclobrantkiata. 



Genera, Dorii, including Polycera of Cuvier; Onckidorii; and 

 Pcronia. 



Order 4. Inferobranchiala. 

 Genera, Phyllidia and Linguella. 



Order 5. Ifucleobranchiata. 



Family 1. Ktctopoda. Genera, Pterotrachea, including Firola, 

 Firoloida, and SagitcUa of Lesueur; and Carinaria. 



Family 2. Pleropoda. Genera, Atlanta, Spiratella, and Argonauta. 

 Sub-Class lll.Paracephalophora Hermapkrodita (Patella, Linn.). 

 Section I. Organs of Respiration and Shell symmetrical. 



Order 1. Cirrhobranckiata. 

 Genus, Dentalium, including Entale of Defrance, 



Order 2. Cervicobranchiala. 



Family 1. Sett/era. Genus Patella, including Helcion of De Montf. 

 Family 2. Branchifera. Genera, Fitiurella ; Emarginula, including 

 Simula of Defrance ; and Parmophorui. 



Section IL Organs of Respiration and Shell non-symmetrical. 



Order 3. Scuiibranckiata. 



Family 1. Otidea. Genera, Haliotit, including Padollus of De 

 Montf., and Stomatia of Lam. ; and Ancylut. 



Family 2. Calyptracea. Genera, Creptdula ; Calyptrcea ; Capului ; 

 Hipponyx ; and Notrema. 



Class IIL Acephalophora. 



Order 1. Palliobranchiata. 



Section I. Shell symmetrical 



Genera, Lingula ; Terebratula, including Pentamtrut, Spirifer, and 

 Productut, Sow.; Strygocephalui, Defr.; and Magat ; Thecideat 

 Strophomena ; Pachyta ; Dianchora ; and Podopiii. 

 Section IL Shell non-symmetrical, irregular, constantly adherent. 

 Genera, Orbicula, including Ditcina, Lam., and Crania. 



Order 2. Rudi.it a. 



Genera, Sphendita ; Hippuritct; Jtadiolitet; irotritei, including 

 lodamia of Defr. ; and Calceola. 



Order 3. Lamellibranchiata. 



Familyl. Ottracea. Genera, A nomia; Placuna; Harpax ; Oitrea; 

 and Gryphon. 



Family 2. Suboitracea (Oitrea, Linn.). Genera, Oitrea; Spondylut 

 Plicalula; Hinnitet ; Pecten, including Amutium and Pandora of 

 Megerle, and Ifeithea of Dronet ; Peilum ; and Lima. 



Family 3. Margaritacea. Genera, Vultella; Malieut ; Perna; Ore- 

 natula; Inoceramtu; Catillut; Pulvinita; GerviUia; and Aricula, 

 including Margaritiphora of Megerle, Margarita, Leach, Meleagrina, 



I >:ilj. i! ' k. 



Family 4. Mytilacea. Genera, Mytilut, including Modiola and 

 Lithodomut (Lithophaga of Megerle) ; Pinna. 



Family 5. Polyodonta, or Arcacea (Area, Linn.). Genera, Area, 

 including Tritit of Oken, and Cucullaa of Lam. ; Pectunculut ; and 

 Nucula. 



Family 6. Submytilacea. a. (Species with an epidermis and nacreous 

 freshwater). Genera, Anodonta, including Berpolit, Leach, Iridina, 

 Lam., Diptat of I-each, Alatmitodonta of Say, and Crittaria of 

 Schum. ; Unio, including Hyria and Cattalia of Lam. 6. (Species 

 without an evident epidermis, not nacreous, and more or leas pecti- 

 nated ; marine). Cardila, including Venericardia and Cypricardia of 

 Lamarck. 



Family?. Chamacea. a. (Shell irregular). Genera, Chama, inclii 

 Chamottrea of De lloisey ; Dicerat ; Etheria, b. (Shell regular) 

 Tridacna, including I/ippoput, Iiocardia; Trigonia, including Ojnt 

 of Defrance. 



Family 8. Conchacea. 



Section 1. Regular Conchacca, with lateral distant teeth. Genera 

 f'ardium, including Hemicardium ; Donor, including Capta, Lam. 

 THliiia, including Trllinidfn, Lam. ; Lucina, including Loripu of Poli 

 AmphiJttma of Lam., Fimbria of Megerle, Corbit of Cuvier ; Cyclat 

 including Cornea, Corbicula, and Pitum of Megerle, Cyretia ant 

 tialaJkitaot Lam. ; Cyprinai Mactra; and Erycina. 



Section 2. Kegular Conchacra, without lateral distant teeth ; Crat 

 Kii'lla ; Venut, including Arthemit of Poli, Vrnui, Cyiheraa, an< 

 Crtutma of Lam. (Aitarle of Sowerby, Nicania, Leach), Triguetra o' 

 De Blainville, and Macoma of Leach. 



Section 3. Irregular Conchacea ; Venerupit, including Rupellaria of 

 FL de BelL, and Petricola of Lam.; CoraUiophaga ; Clotho ; and 

 I'nyulina. 



Family 9. Pyloridea, 



Section 1. Ligament internal Genera : a, Corbula ; Sphrrna ; 

 Otteodetma, including Rupicola of Fl. de Bell. ; Thracin ; Hcmiry- 

 dottoma; and Anatina, b. Mya, including Erodona of Daudin ; 

 Lulricola, including Ligula of Leach, and Lutraria of Lamarck. 



Section 2. Ligament external and eouvex.Ptammocola, including 



>iammol>i<i and Piammolta. of Lam. ; Soletellina ; Sanyuinolaria ; 

 Solecurtiu ; Sole* ; Solemya ; Glycimera, including Xyoeondia ( ? ), Pano- 



xea, Sajricara, Byttomya, RJiomboida ; Jfiattlla, including Biapholiiu 

 of Leach ; Gaitrocktena ; Clavagella ; and Atptryillum. 



Family 10. Adamacea. Genera, Pholat, including if arietta of 



Leach ; Trrtillna ; Teredo ; Fittulana ; and Septaria. 



Order 4. Heterobranchiata. 



Family 1. Atddiacea (Aicidia, Linn.). 



Tribe 1. Simple Ascidians. Genera, Aicidia; Bipapittaria ; Podia. 



Tribe 2. Aggregated Ascidians. Genera, Pywa ; Dutoma, including 

 SigeUina of Savig. ; Hotryllnt, including Diazoma and Pohjclina uf 

 Savig., and Polycycltu and Solryllta of Lam. ; Synoicum, including 

 Enoalium, Itideonuin, and Aplidium of Savig., and Pulmonella of 

 Lam. 



Family 2. Salpacea. 



Tribe 1. Simple Salpians. Genus, Salpa, including the genera 

 Monophore and Timoriennt of Quoy and Gaimard. 



Tribe 2. Aggregated Salpians. Genus Pyrosoma. 



Sub-Type MAI.EXIOZOAUIA. 



Class I. Nematopoda. 



Family 1. Lepadicea. Genera, Lepat ; Gymnolepai, including Otion 

 and Cintra* of Leach ; Pcntalcpas, including Pentalatmit and Pollicipei 

 of Leach ; Polylepat, including Sealpellum of Leach ; and Lithoitjvu. 

 Family 2. Balanidea (Balama, Brug.). 



a. Operculum articulated, and more or less vertical. Genera, 

 Balanui, including Acaitn of Leach ; Ochlhmia ; Conia, including 

 Asemu* of Ranzani; Creuria, including Pyrgonia of Savig.; and 

 Chthalamtis. 



b. Operculum not articulated, and more or less horizontal Genus, 

 Coronida, including the genera Chelodobia of Leach, Cetopira and 

 Diadfina of Ranzani, and Tubicinella of Lam. 



Class IL Polyplaxiphora. (Chiton, Linn.) 



Genus, Chiton, including the genera Chitonellm of Lam., and CAifo- 

 ncllm of De Blainv. 



Our limits will not allow us to do more than refer to the systems 

 of Schumacher, Latreille, and Rang, though they will, the latter 

 especially which is in many respects a happy combination of the 

 systems of Cuvier, Lamarck, and De Blainville, with some alterations 

 well repay the student for their perusal. 



The recent publication of the work of Professor Edward Forbes 

 and Mr. Sylvanus Hanley on the ' British Mollusca,' enables us to give 

 the classification adopted in that work, and also the names of the 

 British genera of Mullutca : 



ACEPHALA TL-XH ATA. 



BOTRYLLID.E, or True Compound Ascidians. Aplidium. Sid- 

 nyum. Pulycliiium. Amouroucium. Ltptoclinum. Dittoma, Botryllta. 

 Botrylloidet. 



CLAVELIICID.B, or Social Ascidians. Clavelina. Perophora, Syn- 

 telhyi. 



AsciDiAD.e. Aicidia. Molgula. Cynthia. 



PELONAIAD& Pelonaia. 



SALPIDA Salpa. Appendiculana. 



LAMELI.IBHANCHIATA. 

 PnoLADlDjE. Teredo. Xylophaga. Pholat. Pholadidea. 

 GASTROCBXKIDA Gattrochtena. Saxicava. Petricola. Venerupit. 

 MVAD.E. Mya. Panopaa. 

 CORBULID*. Corbula. Natra, Poromya, 

 PANDORID*. Pandora. Lyontia, 

 ANATISID*. Thracia. Cochlodetma. 

 SOLXMDA. Solen. 



SOLECUBTJD*. Ceratitolen. Solccurtut. 



TEI.I.IMDJR. Piammobia. Diodonta. Tcllina. Syndotmya, Scrobi- 

 cularia. 



DONACIDA Donax. Ervetia, 



MACTRIDJL Mactra. Lutraria, 



Vr.NKRlDfi. Tape*. Cytherta, Venut. Artemit. Lucenoptit. 



CVPRINID*. Cyprina. Circe. Attarte. Iiocardia. 



CARDIADA Cardium. 



LI;CINIDJB. Lucinia, Diplodonta, 



KELLIADA JUoHtacuta. Turtonia. Kcllia. Lepton. Galeommti. 



CvcLAOlOJt Cyclat. Pitidium, 



USIONID*. Unto. Anodonta. 



MTTILIOA. Dreittena. Mytilut. Modiola, CrencUa. 



ARCAD.B. Nucula. Leda. Area. Pectunculut. 



ATICOLACKJE. Avicula. Pinna. 



OSTRBAU.E. Lima, Pecten. Oilrca. Anomia. 



AOEPIIALA PAIXIOBRANCHIATA, or BRAOHIOPODA. 

 TERF.BRATCI.ID.F.. Ifypothyrit. Terebratula. Argiope. 

 CBANIAD.E. Crania. 



LAIIEI.UBRANCUIATA. 

 PTKROPODA. Hyalea,. Spiralit. 



